Comparing with normal glass wool, this kind of hydrophobic glass wool has excellent performance as water resistance and thermal insulation. Generally speaking, the glass wool mainly depends on the insulation materials of air layer for insulation. However, the normal glass wool's insulation performance would be hardly destroyed once it is exposed to moisture and the water penetrate into the glass wool. Our newly high-end product--hydrophobic glass wool, has overcomed the weaknesses and is widely used in curtain walls, air duct, transport equipments, pipes and so on.